CA2229212A1 - Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing - Google Patents

Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing Download PDF

Info

Publication number
CA2229212A1
CA2229212A1 CA002229212A CA2229212A CA2229212A1 CA 2229212 A1 CA2229212 A1 CA 2229212A1 CA 002229212 A CA002229212 A CA 002229212A CA 2229212 A CA2229212 A CA 2229212A CA 2229212 A1 CA2229212 A1 CA 2229212A1
Authority
CA
Canada
Prior art keywords
pulp
chelating agent
mixing steps
mixing
bleaching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002229212A
Other languages
English (en)
French (fr)
Inventor
Ulf Germgard
Jonas Lindquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet AB
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20399294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2229212(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2229212A1 publication Critical patent/CA2229212A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)
CA002229212A 1995-08-24 1996-08-09 Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing Abandoned CA2229212A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9502962-5 1995-08-24
SE9502962A SE504803C2 (sv) 1995-08-24 1995-08-24 Behandling av massa med komplexbildare i minst två blandningssteg utan mellanliggande tvätt

Publications (1)

Publication Number Publication Date
CA2229212A1 true CA2229212A1 (en) 1997-03-06

Family

ID=20399294

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002229212A Abandoned CA2229212A1 (en) 1995-08-24 1996-08-09 Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing

Country Status (11)

Country Link
EP (1) EP0846199B1 (sv)
AT (1) ATE198916T1 (sv)
AU (1) AU6839996A (sv)
BR (1) BR9610199A (sv)
CA (1) CA2229212A1 (sv)
DE (1) DE69611680T2 (sv)
ES (1) ES2153593T3 (sv)
NO (1) NO980753L (sv)
PT (1) PT846199E (sv)
SE (1) SE504803C2 (sv)
WO (1) WO1997008380A1 (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508239C2 (sv) * 1997-01-03 1998-09-21 Sunds Defibrator Ind Ab Behandling av massa med komplexbildare i minst ett blandningssteg, utan användning av blektorn
CA2728278C (en) 2008-06-20 2016-06-28 Zheng Tan Composition and recording sheet with improved optical properties

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
SE9201477L (sv) * 1992-05-11 1993-06-28 Kamyr Ab Saett vid blekning av massa utan anvaendning av klorkemikalier
SE502665C2 (sv) * 1993-06-11 1995-12-04 Kvaerner Pulping Tech Sätt och reaktor för ozonblekning
SE501836C2 (sv) * 1993-09-21 1995-05-22 Sunds Defibrator Ind Ab Blekning av kemisk massa varvid massan behandlas med komplexbildare före och efter ett ozonsteg

Also Published As

Publication number Publication date
SE504803C2 (sv) 1997-04-28
EP0846199A1 (en) 1998-06-10
EP0846199B1 (en) 2001-01-24
ATE198916T1 (de) 2001-02-15
ES2153593T3 (es) 2001-03-01
NO980753D0 (no) 1998-02-23
AU6839996A (en) 1997-03-19
PT846199E (pt) 2001-06-29
DE69611680T2 (de) 2001-05-10
BR9610199A (pt) 1998-08-04
SE9502962L (sv) 1997-02-25
NO980753L (no) 1998-02-24
SE9502962D0 (sv) 1995-08-24
WO1997008380A1 (en) 1997-03-06
DE69611680D1 (de) 2001-03-01

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Legal Events

Date Code Title Description
FZDE Discontinued